fe3o4 -水和γ- fe2o3 -水磁性纳米流体的磁化行为

IF 1.1 4区工程技术 Q4 Engineering

High Temperatures-high Pressures Pub Date : 2021-01-01 DOI:10.32908/hthp.v50.995

R. Alsangur, S. Doğanay, A. Turgut, L. Çetin

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引用次数: 0

摘要

磁性纳米流体是一种含有分散在基液中的磁性纳米颗粒的胶体。在外加磁场的作用下，它们可以被磁化和操纵。此外，它们的热物理性质可以调整。因此，研究它们的磁化行为具有重要的意义。为此，用振动样品磁强计(VSM)研究了现有文献中常用的磁铁矿(Fe3O4)-水和磁铁矿(γ-Fe2O3)-水的磁化行为。采用不同体积浓度的fe3o4 -水(1和2%)和γ- fe2o3 -水(1.1和2.2%)纳米流体进行测量。结果表明，γ- fe2o3 -水磁性纳米流体比fe3o4 -水磁性纳米流体具有更高的饱和磁化值。测量还指出，随着体积浓度的增加，两种磁性纳米流体的磁化强度也会增加。

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Magnetization behaviour of Fe3O4–water and γ-Fe2O3–water magnetic nanofluids

Magnetic nanofluids are colloids that contain magnetic nanoparticles dispersed in a base fluid. In the presence of the external magnetic field, they can be magnetized and manipulated. Moreover, their thermophysical properties may be tuned. Therefore, it is important to investigate the magnetization behaviour of them. For this purpose, magnetization behaviours of magnetite (Fe3O4)-water and maghemite (γ-Fe2O3)-water which are commonly used in the available literature were investigated by a vibrating sample magnetometer (VSM). Various samples with different volume concentrations for Fe3O4-water (1 and 2%) and γ-Fe2O3-water (1.1 and 2.2%) nanofluids were used in the measurements. The results indicated that γ-Fe2O3-water magnetic nanofluid has higher saturation magnetization values than Fe3O4-water magnetic nanofluid. The measurements also pointed out that as the volume concentration increases, the magnetization of both magnetic nanofluids increases as well.

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来源期刊

High Temperatures-high Pressures THERMODYNAMICS-MECHANICS

CiteScore

1.00

自引率

9.10%

发文量

期刊介绍： High Temperatures – High Pressures (HTHP) is an international journal publishing original peer-reviewed papers devoted to experimental and theoretical studies on thermophysical properties of matter, as well as experimental and modelling solutions for applications where control of thermophysical properties is critical, e.g. additive manufacturing. These studies deal with thermodynamic, thermal, and mechanical behaviour of materials, including transport and radiative properties. The journal provides a platform for disseminating knowledge of thermophysical properties, their measurement, their applications, equipment and techniques. HTHP covers the thermophysical properties of gases, liquids, and solids at all temperatures and under all physical conditions, with special emphasis on matter and applications under extreme conditions, e.g. high temperatures and high pressures. Additionally, HTHP publishes authoritative reviews of advances in thermophysics research, critical compilations of existing data, new technology, and industrial applications, plus book reviews.